Quick-detachable dust-cap.



L. L. 'GKRIBALDI.

QUIGKDETACHABLE DUST CAP.

APPLICATION FILED'IIAR. 15. 1916.

1,255,091; Patented Jan. 29,1918.

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qnlinv um! (his! my, I engaging Mt-itlau 10 ilnng'm 15 M rithv! am! of (hc'rccess. Thoreactuated locking gagement with said a said and its valve, a valve stem and tach or detach the dust cap is limited to onefourth revolution, whereas in the case of the screwthreaded dust caps formerly em ployed, as many as :twenty-five turns are often necessary to remove or replace said ca I lhe device herein described embodies feasecure in its operation at all times.

Having thus described my invention, what I claim and desire to secure by Letters Patent is- 1. In combination with a pneumatic tire. and its valve, a valve stem and a screwthreaded fastening nut therefor, a dust cap for said stem fitting loosely thereon, sprin connections between sai cap-and nut, said locking connections comprising a shell formed on the exterior.of

said nut, a flanged and"recessed. plate on saidshell, wings batheca to enter said V a'cqllar beneath sai recessed plate,

said collar into enate, lugs on said colneath the flanges of plate, .whereby the wings on thecap may e inserted through the recesses to lie between the lugs on the collar, and the cap thereupon turned to present its wings beneath the fiangw on said late, whereupon 'the lugs on said collar 'wil be moved into register with the recesses, and said collar a spring for pressin r normally seated pressed outwardly by the spring to thereby oclr itself and the dust cap against further 2.- In combination with a pneumatic tire a screwthreaded fastening nut therefor, a dust cap for said stem fitting loosely' thereon,"spring actuated locking connections between said capand nut, said locking connections comprising ashell formed on the exterior of said nut, a flanged and recessed plate on said shell, wings on the ca .to enter said recesses, a collar beneath sai recessed plate, a spring for pressing said collar into engagement with said plate, lugs on said colar'normally seated beneath the flanges of said plate, whereby the wings on the cap may be inserted through the recesses to he between the lugs on the collar, and the cap thereupon turned to present its wings beneath the flanges on said plate, whereupon the lugs'on said collar will be moved into register with the recesses and said collar pressed outwardly by the spring to-thereby lock itself and the dust cap against further rotation, and means for limiting the rotative movement of said collar on the nut to less than a full turn.

3. In combination with a valve, a threaded valve stem, a nut for said valve stem, a dust cap for said stem fitting loosely there on, a lockin plate, means for securing said late to said nut locking means on said 'ocking plate, lociring means on said be the locking means on sai for engagin plate to hol the cap on said nut 1n positijon over said valve stem, a rotatable collar surrounding said valve stem below said plate, lockin means on said collar for enaging the ocking means-on said cap to ock said collar and 'cap together against turning with relation to each other, and for enga 'ng'the locking means on said locking p ate to prevent said-collar and said cap from turning with relation to said plate and a sprin in said nut for pressing said collar and t e locking means on said cap toward said plate and for forcin the loclging means on said collar and anti cap into lockin engagement with the locking means on sai .plate, and said cap and collar being adapted means-on said plate and turned. to un- 100 the (to? and plate so that the cap may be remov r A 4. In combination with hi pneumatic tire and its 'va'lve a valve stem and a screwthreaded fastening nut therefor a dust cap for said steitf=fitting loosely thereon, and spring actuated lockin connections between said cap ailfl nut, sai locking connections comprising aj."'recessed plate on said nut, wings on thepap to enteg said recesses, and a collar, spring-pressedgi'gainst said late and having locking lugs to enter sai recesses, when the capis turnedto' move the wings out of register with the f I In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

LESTER L. uillaume Witnesses:

Jorm H. Hnmung, W. W. Haunt. 

